JP2002144103A - Cutting work method and cutting work apparatus for end bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting work method and a cutting work apparatus for cutting an end bearing with high accuracy. SOLUTION: A work 7 is first temporarily held by a three-jaw chuck 41. At this time, holding jaws 43 of the three-jaw chuck 41 are fitted in a gap up to the inner periphery of the work 7, thereby preventing distortion due to chuck pressure in the work 7. In this state, when compressed air is supplied to an air chamber 29, a second support cylinder 5 is moved to the left in the drawing with a piston 25 and a holder 15, whereby the work 7 is clamped by the first support cylinder 3 and the second support cylinder 5 with designated pressing force. When the work 7 is held, the first support cylinder 3 connected to a main spindle 11 is driven to rotate, and the work 7 pressed to the first support cylinder 3 and the second support cylinder 5 start following rotation. Whereupon, cutting tools 45 to 48 are suitably moved to turn the work 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for cutting an end bearing used in a one-way clutch for an automatic transmission of an automobile with high precision.

[0002]

2. Description of the Related Art Generally, an automatic transmission for an automobile is provided with a planetary gear transmission mechanism of about 3 to 5 speeds in addition to a torque converter as a fluid coupling, and is provided with friction engagement means such as a clutch or a brake. Gear shifting is performed by appropriately fixing or releasing components (such as a sun gear and a planetary gear) of the planetary gear transmission mechanism. Except for some band-type brakes, a wet multi-plate type in which friction plates and separator plates are alternately arranged is used as friction engagement means provided in the automatic transmission. For (friction engagement), pressure oil from a shift control hydraulic circuit is used. Some of these friction engagement means are provided with a one-way clutch device inside, and a gear shaft or the like is freely rotated in one rotation direction to realize easy shift control. ing.

Usually, a one-way clutch mainly includes an inner ring and an outer ring, and a torque transmitting member interposed between the two wheels to transmit rotational torque only in one direction. End bearings are mounted on both ends to control the relative movement in the axial direction. The end bearing is formed by punching a plate-like material into a ring shape by a press or the like and forming a flange on the inner and outer circumferences. Since high dimensions and shape accuracy are required, each part is subjected to cutting after forming. Conventionally, in cutting,
For example, a method has been employed in which the outer diameter side is held by a three-jaw chuck or the like and the inner diameter side is turned, and then the inner diameter side is similarly held and the outer diameter side is turned.

[0004]

The conventional cutting method for end bearings has some disadvantages as described below. Since the end bearing is a sliding member, a relatively soft metal such as a copper alloy or a bimetal is used. For this reason, if the three-jaw chuck or the like holds the workpiece securely during the turning operation, the work is distorted by the chuck pressure, and the roundness of the end bearing after the cutting is reduced. In addition, since it is necessary to switch the chuck operation between the turning on the inner diameter side and the turning on the outer diameter side, the process becomes complicated, and it is inevitable that the misalignment occurs in both processing times.

In view of this, Japanese Patent Application Laid-Open No. 10-43913 proposes a processing device for clamping and holding a work by a pair of annular members, as a technique for avoiding distortion deformation of the work during turning. However, also in this processing apparatus, since a three-jaw chuck or the like is used as a means for positioning and holding the work when the two annular members hold the work, the soft work is distorted due to the chuck pressure. There is a possibility that the end bearings may be held by the annular member and the roundness of the end bearing after the turning process may be reduced. Further, in the processing apparatus described in the publication, an elastic body such as synthetic rubber is provided on the pressing surface of one of the annular members, but the work for the end bearing has a small plate thickness (for example, about 1 mm). However, it has been impossible to perform turning in a state of being held through the elastic body. The present invention has been made in view of the above circumstances, and has as its object to provide a cutting method and a cutting apparatus for cutting an end bearing with high accuracy.

[0006]

According to a first aspect of the present invention, there is provided a method of cutting an end bearing, wherein an annular work is formed by a driving side annular member and a driven side annular member. After being axially clamped by the pressing force of the end bearing, the drive-side annular member is rotated to rotate the work and the driven-side annular member, thereby causing a tool to contact the work to perform an end bearing. We propose a cutting method.

According to a second aspect of the present invention, in the cutting method of the end bearing according to the first aspect, the driving-side annular member and the driven-side annular member become inner peripheral flanges of the end bearing after the cutting. We propose something to hold the part.

According to a third aspect of the present invention, in the method for cutting an end bearing according to the first or second aspect, the work is held by holding means having a holding portion facing an inner peripheral surface thereof with a predetermined gap. After that, it is proposed that the drive-side annular member and the driven-side annular member sandwich the drive-side annular member.

According to a fourth aspect of the present invention, there is provided the end bearing cutting method according to the third aspect, wherein the holding means is a chuck having three or more holding claws that open and close in a radial direction. .

[0010] According to the invention of claim 5, according to claims 1 to 4,
In the cutting method of the end bearing, the driving side annular member and the driven side annular member relatively move via a ball spline bearing.

Further, in the invention of claim 6, according to claims 1 to 5,
In the method of cutting an end bearing, at least one of the driving-side annular member and the driven-side annular member is provided with an elastic means acting in an axial direction.

According to a seventh aspect of the present invention, there is provided an apparatus for cutting an end bearing, wherein a drive-side annular member connected to a rotary drive source and an annular work are held together with the drive-side annular member. A driven-side annular member, a pressure means for moving the driven-side annular member and the driving-side annular member toward and away from each other in an axial direction, and a rotation while being sandwiched between the driving-side annular member and the driven-side annular member. And an at least one tool used for cutting the work.

According to the invention of claim 8, in the end bearing cutting device of claim 7, the drive-side annular member and the driven-side annular member become inner peripheral flanges of the end bearing after cutting. We propose something to hold the part.

According to a ninth aspect of the present invention, in the end bearing cutting device according to the seventh or eighth aspect, the workpiece is held at a position sandwiched between the driving-side annular member and the driven-side annular member. There is proposed a device further provided with holding means for holding the peripheral surface with holding portions facing each other with a predetermined gap.

According to a tenth aspect of the present invention, there is provided the end bearing cutting apparatus according to the ninth aspect, wherein the holding means is a chuck having three or more holding claws that open and close in a radial direction. .

According to the eleventh aspect of the present invention, the seventh to seventh aspects are described.
A tenth aspect of the present invention provides an end bearing cutting apparatus including a ball spline bearing that supports the driving-side annular member and the driven-side annular member so as to be relatively movable.

According to the twelfth aspect of the present invention, the seventh to seventh aspects are described.
In the eleventh end bearing cutting device, there is proposed an end bearing cutting device in which at least one of the driving-side annular member and the driven-side annular member is provided with an elastic means acting in an axial direction.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a main part of a processing apparatus according to an embodiment, and FIG. 2 is an enlarged view of a portion A in FIG. As shown in these figures, the processing apparatus 1 includes a first support cylinder 3 as a driving-side annular member and a second supporting cylinder as a driven-side annular member.
A support cylinder 5 is provided, and a disk-shaped work 7 is sandwiched between the support cylinders 3 and 5. The first support cylinder 3 is connected to a main shaft 11 via a cylindrical base 9, and rotates by being driven by an electric motor connected to the main shaft 11. The second support cylinder 5 is rotatably supported by the holder 15 via a pair of angular ball bearings 13. The work 7 has an inner flange 17 and an outer flange 19 on the second support cylinder 5 side, and the support cylinders 3 and 5 sandwich the inner flange 17.

The holder 15 has a ball spline bearing 21
Are connected to a piston 25 fitted in the air cylinder 23 through the rail 22 and the like. The air cylinder 23 is
First and second air chambers 27 and 29 are provided on the left and right of the piston 25 in the drawing.
When the compressed air from the air connectors 31 and 33 is appropriately supplied to the air chambers 27 and 29, the piston 25 (that is, the holder 15) moves left and right in the drawing. In FIG. 2, reference numeral 35 denotes a bellows portion which is an elastic means formed at the base of the second support cylinder 5, and is bent and deformed by receiving a predetermined axial force.

On the other hand, a three-jaw chuck 41 is provided inside the first support cylinder 3. The three-jaw chuck advances and retreats in the axial direction while being supported by the main shaft 11, and the holding claws 43 advance and retreat in the radial direction by compressed air. In the figure, reference numerals 45 to 48 denote first to fourth bytes as working tools.

Hereinafter, a turning procedure of the work 7 will be described. In the case of the present embodiment, the work 7 carried into the processing device 1 is
First, it is temporarily held by the three-jaw chuck 41. On this occasion,
The holding claws 43 of the three-jaw chuck 41 are gap-fitted with a predetermined gap (for example, 0.05 mm) with respect to the inner periphery of the work 7, so that the work 7 is not distorted by the chuck pressure.

In this state, when compressed air is supplied to the air chamber 29, the second support cylinder 5 moves to the left in the figure along with the piston 25 and the holder 15, and the first support cylinder 3 and the second support cylinder The work 7 is held by the cylinder 5 with a predetermined pressing force. At this time, even if there is a mismatch between the end surface of the first support tube 3 and the end surface of the second support tube 5, the bellows portion 3 of the second support tube 5
The work 7 is securely held by the bending deformation of the work 5.

When the work 7 is held, the first support tube 3 connected to the main shaft 11 is driven to rotate, and the work 7 and the second support tube 5 pressed against the first support tube 3 start to rotate. Then, the first cutting tool 45 is appropriately moved to turn the outer circumferential surface of the work 7, and at the same time, the second cutting tool 46 is used for the inner circumferential portion of the outer flange 19 of the work 7, and the third cutting tool 47 is used for the inner circumferential portion of the work 7. The fourth cutting tool 48 turns the outer peripheral portion of the inner flange 17 of the workpiece 7 on the surface.

In the present embodiment, by adopting such an aspect, it is possible to secure a very high dimension and shape accuracy, but it is possible to perform machining on the work 7 at one time, thereby greatly improving work efficiency. did.

Next, loading and unloading of the work 7 into and out of the processing apparatus 1 will be described. FIG. 3 is a side view of the work transfer device, and FIG. 4 is a view taken in the direction of arrow B in FIG. As shown in these drawings, the work transfer device 51 includes a hand 53 that grips the outer peripheral surface of the work 7 and an air cylinder 55 that moves the hand 53 up and down with respect to the processing device 1. Is moved in parallel with the main shaft 11 of the processing apparatus 1.

When the work 7 is carried in, the work transfer device 51 is temporarily stopped above the processing device 1, and then the air cylinder 55 is operated to connect the separated first and second support cylinders 3 and 5. The work 7 gripped by the hand 53 is lowered. Then, after the three-jaw chuck 41 enters the work 7 from the main shaft 11 side, the holding claws 4 of the three-jaw chuck 41 are moved.
3 project radially. At this time, as described above, the holding claw 43 stops with a predetermined gap from the inner peripheral surface of the work 7, and does not apply unnecessary chuck pressure to the work 7. When the work 7 is held by the three-jaw chuck 41, the hand 53 lifts after releasing the work 7 and separates from the processing apparatus 1. Thereafter, as described above, the work 7 is sandwiched between the first support cylinder 3 and the second support cylinder 5, and turning by the cutting tools 45 to 48 is performed.

When the processing of the workpiece 7 by the processing apparatus 1 is completed, the hand 53 descends again to grip the workpiece 7, and then the first support cylinder 3 and the second support cylinder 5 separate from each other and the workpiece 7
To release. Next, after the hand 53 ascends while holding the work 7, the work transfer device 51 moves to move the work 7.
To the next step.

The description of the specific embodiment has been completed.
Aspects of the present invention are not limited to this embodiment.
For example, in the above embodiment, the work is temporarily held by the three-jaw chuck, but a tapered holding jig or the like may be used. In the above-described embodiment, the bellows is provided on the second support cylinder (the driven side annular member) as the elastic means. However, the bellows may be provided on the drive side annular member, or a disc spring or the like may be used instead of the bellows portion. May be used. In addition, the specific configurations of the processing device and the work transfer device can be appropriately changed without departing from the gist of the present invention.

[0029]

According to the method and the apparatus for cutting an end bearing of the present invention, after the annular work is axially clamped by the drive-side annular member and the driven-side annular member with a predetermined pressing force, Since the drive side annular member is rotated to rotate the work and the driven side annular member, the tool is brought into contact with the work to perform the cutting process. Therefore, even when processing a soft work, the chuck is used. Distortion due to pressure does not occur, and high dimensional and shape accuracy can be secured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a processing apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a side view of the work transfer device according to the embodiment;

FIG. 4 is a view as seen from the arrow B in FIG. 3;

[Explanation of symbols]

 1 Processing machine 3 First support cylinder (driving-side annular member) 5 Second support cylinder (driven-side annular member) 7 Work 11 Main shaft 15 Holder 17 Inner flange 19 ‥ Outside flange 21 ‥‥ Ball spline bearing 23 ‥‥ Air cylinder 25 ‥‥ Piston 35 ‥‥ Bellows part (elastic means) 41 ‥‥ Three-jaw chuck 45 ‥‥ First byte 46 ‥‥ Second byte 47 ‥‥ Third Tool 48 ‥‥ 4th tool 51 ‥‥ Work transfer device 53 ‥‥ Hand 55 ‥‥ Air cylinder

Claims (12)

[Claims] 1. A method for cutting an end bearing, comprising: holding an annular work in an axial direction with a predetermined pressing force between a driving-side annular member and a driven-side annular member; and rotating the driving-side annular member. A cutting method of an end bearing, wherein a cutting process is performed by bringing a tool into contact with the work while causing the work and the driven-side annular member to rotate together. 2. The cutting of an end bearing according to claim 1, wherein the driving-side annular member and the driven-side annular member sandwich a portion that becomes an inner peripheral side flange of the end bearing after cutting. Processing method. 3. The work is held by holding means having a holding portion facing the inner peripheral surface of the work with a predetermined gap therebetween, and is then sandwiched between the driving-side annular member and the driven-side annular member. 3. The method for cutting an end bearing according to claim 1, wherein 4. The holding means is a chuck having three or more holding claws that open and close in a radial direction.
The method for cutting an end bearing according to claim 3. 5. The method according to claim 1, wherein the driving-side annular member and the driven-side annular member move relative to each other via a ball spline bearing. 6. An end bearing according to claim 1, wherein at least one of said driving-side annular member and said driven-side annular member is provided with elastic means acting in the axial direction. Cutting method. 7. An apparatus for cutting an end bearing, comprising: a drive-side annular member connected to a rotary drive source; a driven-side annular member for holding an annular work with the drive-side annular member; A pressing means for moving the driven-side annular member and the driving-side annular member toward and away from each other in the axial direction; and a cutting means for cutting the workpiece which is rotated while being held between the driving-side annular member and the driven-side annular member. An end bearing cutting device comprising at least one tool to be cut. 8. The cutting of an end bearing according to claim 7, wherein the driving-side annular member and the driven-side annular member sandwich a portion that becomes an inner peripheral side flange of the end bearing after cutting. Processing equipment. 9. A holding means for holding the work by a holding portion opposed to an inner peripheral surface thereof with a predetermined gap at a position sandwiched between the driving-side annular member and the driven-side annular member. The end bearing cutting device according to claim 7 or 8, wherein: 10. An end bearing cutting apparatus according to claim 9, wherein said holding means is a chuck having three or more holding claws which open and close in a radial direction. 11. An end bearing cutting device according to claim 7, further comprising a ball spline bearing for supporting said driving side annular member and said driven side annular member so as to be relatively movable. 12. An apparatus according to claim 7, wherein at least one of said driving-side annular member and said driven-side annular member is provided with an elastic means acting in an axial direction.
An end bearing cutting device according to the above.